Corporal Jones takes 12 hours to complete a planned maintenance check on
an anti-submarine helicopter. Jones had been working on a helicopter for
4 hours when sergeant Marco arrived to help him finish the job. They
complete the check in 2 hours. How long would it have taken Sergeant
Marco to complete the job alone?

A bus leaves point A travelling at a speed of 10 mph. 22 minutes
later a car leaves point A travelling in the same direction as the bus
at 40 mph. At what distance will the car catch the bus, and how much
time will have elapsed since the car left point A?

A group of people planned to rent a large beach house for a weekend
trip. They were to share the $800 cost equally. However, two people
were unable to go and this increased the cost for each person by $20.
How many persons were in the original group?

Eric the sheep is waiting in line to be shorn. Each time a sheep at
the front of the line gets shorn, Eric sneaks up line four places.
Describe a rule you could use to find the number of sheep shorn
before Eric for any number of sheep in front of him.

Mr. Li has fewer than 200 sweets. He wants to give each pupil in his
class an equal number of sweets. If he gives each pupil 2 sweets, he will
have 70 sweets left over; if 4, he will need 10 more sweets. How many
pupils are there in the class? How many sweets does Mr. Li have?

When the gun sounded, only two-fifths of the racers began to run. If
460 racers began to run, how many racers were there in all? Can you
show me how to figure out what a fraction is without knowing the total
number?

Mary and Patty leave their house at 2 o'clock, following the same
route. Patty walks at a steady pace of 4 mph. Mary walks at a
leisurely rate of 2 mph for 2 hours and then jogs at 6 mph. When will
Mary catch up with Patty?